Zane Gilmore wrote: > In the GIMP picture menu: > Image->Mode->Decompose There is a choice ther for CMYK > > And it seems to produce four images that might be tcolour separations. > Isn't this what is being talked about? > > (IANA printer but isn't this CMYK support?)
That creates a CMYK colour separation from an RGB image. Heres a nice definition that explains what CMYK is better than I can: "Abbreviation for cyan, magenta, yellow, and black; the inks used in process printing. They represent the subtractive color model, where a combination of 100% of each component yields black and 0% of each yields white. Cyan, magenta, and yellow are the subtractive complements of red, green, and blue respectively." and this... "One of the most difficult aspects of desktop publishing in color is color matching -- properly converting the RGB colors into CMYK colors so that what gets printed looks the same as what appears on the monitor." The thing is I can look at a colour matching chart from a particular printer, see the *exact* colour I'll get from 10% cyan, 40% magenta and 60% yellow, and when I put that 10/40/60 combination into photoshop I'll know *exactally* what colour is going to come out of the printer even if it looks different on the monitor - because the image knows the CMYK value of the colour and photoshop is just displaying an RGB approximation of it on screen. Sascha
